
* {padding:0;margin:0}
html,body {
    width: 100%;
    height: 100%;
}
#content{
    margin-top: 20px;
    width: 100%;
    display: flex;
   justify-content: center;
}
.total {
    border-radius:10px; 
    width: 300px;
    height: 30px;
    border: solid purple 5px;
}

.total .num {
    border-radius: 5px;
    height: 30px; 
    background-color: red;
}
button{
    margin-left:80px; 
    width: 120px;
    height: 50px;
    border-radius: 5px;
    box-shadow: 2px 2px ;
}
